Slag-removing mechanism for open-hearth furnaces.



w. A. :wsmsm. SLAG REMOVING MECHANISM FOR OPEN HEARTH FURNACES.

7 APPLICATION FILED ram-1s, 1916. .1,23,5%, Patented Aug. 28, 1917.

3 SHEETPr-SHEET l.

W. A KGSINSKE. SLAG REMOVING MECHANISM FOR OPEN HEART FURNACES.

APPLICATION FILED MM if), 1916- Patentefi Aug. 28, 1917.

k i 11:57 I

Q @M m W. A. KOSINSKI.

SLAG REMOVING MECHANISM FOR OPEN HEARTH FURNACES.

APPLICATION FILED MAR. l5, l9l5- ,5536, Patented Aug. 28, 1917.

3 SHEETS-SHEET 3.

C r mm \Q N TY RN Sn L -- SLAG-REMOVING MECHANISM ron OPEN-HEARTH rU nvAcns.

To wiiom may concern Beit known that I, WA TER A. Kosinsxi, a citizen of the.United States, and a resident of the city of Chicago, county of Cook,and

State of Illinois, have invented certain new of removing the slag therefrom. Under the intense'heat, usually from 3,000 to 3,500 de greesFahrenheit, the bricks comprising the walls of the fines and chambers of open hearth furnaces collect slag whichdrips into the slag pockets disposed below the furnaces and; this dripping runs down the Walls and forms in a, large mass around the slag pocketsso that it is necessary to periodically shut downthe furnace for the purpose of cleaning the walls of the fiues and chambers and for removing-the-accumulations of slag therefrom. Various methods have been employed to do thiswo'rk and the apparatus I have designed is for the purpose ofremoving the slag as fast as it accumulates in the down for the purpose. One of the objects of my invention is the provision of suitable mechanism that'is adapted to break off and disengage the lower strata of slag, thereby causing the same to fall into a box from which itmay be easily removed without the necessity of shutting down the furnace for this purpose. Another object of my'mvention is theprovision in a slag-box of means formaintaining a constantly changing supply ofwater whereby the material of the box is protected from excessively high temperatures and -the-slag is rendered extremely brittle and {easily broken up and removed I 'when received therein. Another object is to .45,

cover the water in the slag-box with soot or other finely divided floating material which will be'interposed between the water and the blast. :Still another object of my invention 'is the. provision of means whereby the eachmnlation of soot, and other substances of lighten'specific gravity than watergwhich floattupon the. surface of the water in the boxfiiwill be prevented from entering the drai-1-1; pipes leading therefrom. o Other objects of my invention will be obvious to per- Specizleation of Letters Patent.

sons skilled in the art to which the same pertains, and I desire to accomplish the divers ob1ects' thereof by the means and in the manner hereinafter fully described and as more particularly pointed out in the Figure 1 is a longitudinal vertical section of a fragmentary portion of a furnace show- .mg a longitudinal side elevation of my invention applied thereto.

-Fig. 2 is a longitudinal section of the lower portion of a slag pocket showing my invention in central section and drawn to a larger scale. a

' Fig. 3 is a top plan of my invention illustrating the relative disposition of the elements therein.

Fig. 4: is a vertical longitudinal section similar to Fig. 2,0f a slightly modified form of my invention.

Fig. 5 is a transverse vertical section taken on 1ine55, Fig. 3 and looking in the direction indicated by the arrows.

Fig. 6 1s a transverse fragmentary section of a modifiedconstruction of the side wall of the slag-box. ;pooketsso,that the furnace need not be shut Fig. 7 is a fragmentary section illustrating the manner of removing carbon. deposits from theface of the damplate of the drain. Referring to the drawings, wherein similar reference characters havebeen employed .to designate the same parts throughout the end, as shown at 14, and immediately'below the furnace proper the wall is cut away and the same is box, 15. p

The -slag-box, just referred to, is of an elongated, substantially rectangular shape and constructed of heavy sheet metal, having'a transverse bridge, 16, below and alining with thefront wall of the furnace, and at its forward end has an inclineway, or chute, 17, that extends e'xteriorly 0f the furnace. The slag -b'ox, '15, is "disposed Patented Aug. 28,1l91l7. Application filed March 15, 1916. Serial No. 84,272. i l l I provided with a suitable slagas shown.

as to receive the accumulation of slag, soot, and the like from the furnace and is preferably kept filled with water through the medium of a suitable nozzle, 18, that extends transversely across the inner end portion thereof and receives its supply of water through pipes, 19. Immediately above the nozzle, 18, the slag-box is provided with a relatively wide bridge-plate, 34, and from below the pipes, 19, is. extended a shorter plate, 19, which with said upper plate forms the nozzle, 18, heretofore referred to. The water is drained from the slagbox, preferably below the front wall of the furnace, through a suitable drain or gutter, 20,- from which the drainage is carried off through outlet pipes, 21. On account of the fact that the slag-box is provided with and will receive a considerable quantity of soot and other refuse material of lighter specific gravity than the water, the former will float upon the surface of the latter, and in order to preventthis refusefroni escaping by entering the drain gutter, I have constructed a transversely disposed dam, 22, extending-the length of the gutter. This dam, 22, is preferably provided on its face nearest the drain gutter with hinge-brackets, 23, that are pivotally mounted upon and carried by suitable lugs, 24, depending from the bridge, 16, and the said brackets are connected at their lower ends by means 0 a link, 25, with an irregularly shaped lever, 26, which has its lower end portion extended into the slag-box and has its upper outer portion provided with a handle whereby the mechanism may be operated by reciprocating the latter. The purpose of making the dam, 22, movable is to break away accumulations of slag and the like, from the front thereof whenever it is found necessary.

The slagwill frequently accumulate above the slag-box and it is necessary to break away the same in order to clear the slag pocket of this. accumulation. I prefer to do this by means of suitable racks or combs, 27 that are disposed along the longitudinal sides of the slagrbox and preferably comprise elongated bars of cast metal, the upper surfaces whereof are provided witha plurality of pointed teeth, 28, substantially These combs or rack bars are disposed parallel to each other adapted to beraised upwardly and at the same time moved forwardly in order to have their teeth, 28, extend above the horizontal plane of the top of the box and to cut into the lower portion of the mass of slag accumulation. I prefer to do this by mount- 29, that are constructed substantially in the manner shown in Fig. 6 of drawings, wherein it will be seen that said links have their lower bearing bosses mounted upon suitable and are the combs, upon suitable pivoted links,

bolts or spindles, 30, projecting inwardly from the side walls of the slag-box, and have their upper portions provided with bearing bosses to engage stubs projecting laterally from the side of the combs. A suitable pitman, 31, is connected at its lower end to'the forward one of the links, 29,

and from thence extends through the outer open portion of the slag-box where its outer end is mounted upon an eccentric cam, 32, disposed upon a rotatable shaft, 33, whereby said pitman is given a reciprocatory motion that is transmitted to the combs through the links, 29.

In order to break away the slag'accumulation from the end of the bridge-plate, 34, I'prefer to mount a suitable sliding plate, 35, between several pairs of oppositely disposed guide lugs, 36, and the said plate, 35, is maintained by its. guides in an inclined plane so that, when it is moved forwardly, its front edge will be raised to an extent sufficient to break away the slag accumulaf movable elementfor the purpose of actuating sliding plate 35.

The bottom of the slag-box is preferably rovided with an elongated trough or gutter, 38, that extends from substantially the rear end to the front end of the box, and the portions, 39, of the bottom of-the box disposed upon each side of the trough are inclined upwardly and outwardly, substantially as shown in Fig. 5 of the drawings, so that the portion of slag that has been broken away rom the mass in the slag pocket will gravitate or fall into the said trough, 38, where it is conveyed forwardly by means ofa screwconveyer, 40. diameter substantially corresponding with the diameter of the trough, 3S, and has the inner end of its shaft, 41, journaled in suitable bearings, 42, in the rear of the slag-box. The forward or front end of said shaft extends through a suitable bushing 01' stufiing box, 43, in the inclineway, 17, and its extended endis provided with a worm gear, 44. This worm gear is driven by a suitable'wo'r'm',

This screw conveyer is of a.

45, mounted upon and rotated by the shaft, 46, and driven in any suitable manner, thej; same being geared up with the shaft, 33, 1}

that is employed for actuating the pitman and combs.

'From the above it will be observed that the mechanism for removing the slag may be operated in a continuous manner, so that it will not be necessary to shutdown the furnace periodically, as is now the case, when masters a upon being moistened by the water, it becomes very brittle and the constant rotation of the screw will disintegrate it into small bits, at the same time forcing it forwardly and out of the box onto the inclineway, 17,

where it may be removed by shovels or other implements. Owing to the intense heat, WhlOh is frequently between 3,000 and 3,500 degrees Fahrenheit, I have found it desirable to insulate the side walls of the box by means of suitable water tanks or jackets, 457,

through which wateris kept circulating by means of inlet pipes, 48, and drain pipes, 49. If desired, these insulating jackets may be dispensed with and the side walls of the box protected by fire brick, 50, as shown in Fig.

6 of the drawings.

It may be found expedient 'to dispose the screw conveyer, 40, so that it will entirely remove the slag from the box, and for this purpose I have designed the structure shown in Fig. 4 of the drawings, wherein a suitable pit, 51, is constructed in front of the front wall of the furnace and below the outer ex tended wall of the box and thebottom of the slag-box is inclined upwardly and out 'wardly. The gutter or trough, 88, is in this instance inclined, as shown, and a suitable opening or passageway, 52, is made in the bottom of the outer end thereof adjacent the outer end of the screw conveyer. The other elements of the structure correspond in construction and operation with those shown in the other form of my invention above described.

In either of the structures hereinbefore described, it is desirable to float upon the surface of the water inthe slag-box, a suitable amorphous carbon or carbon by-product. The purpose of having a surface of this kind upon the water is to assist in insulating the latter from the intense heat of the furnace and I have found, after considerable experimentation, that this operates in a very successful manner. I While I have illustrated and described certain specific means for carrying out-my invention, it, of course, will be obvious to others skilled in the art to which my invention pertains, that divers modifications or refinements thereof are possible without materially departing from the spirit of my in vention. I desire it understood, therefore,-

that all such changes and alterations are con.

templated within the scope of my invention as expressed in the appended claims. What I claim is:

1. In a furnace a slag-box, reciprocable combs provided with upwardly projecting teeth disposed adjacent the side walls of said slag-box and adapted to be reciprocated longitudinally and upwardly above the plane of the top of said slag-box, means for reciprocating said combs, [a conveyor within said slag-box, and devices for actuatmg said conveyer.

2. In a furnace a slag-box, reciprocable combs provided with upwardly projecting teeth disposed adjacent the 'sidewalls of said slag-box and adapted to 'be reciprocated longitudinally and upwardly above the plane of the top of said slag-box, means for reciprocating said combs, a rotatable screw conveyer within said slag-box, and devices for actuating said conveyer. I n

3. In a furnace a slag-box of substantially rectangular shape and provided with a ta,

pered bottom, elongated slag-dislodging' combs pivotally mounted upon the side walls of said box and provided with teeth j adapted to be raised above the horizontal plane of the top of said sidewalls, means for actuating said combs, and a continuously operable conveyer disposed in the lowermost portion of the bottom of said box.

4. In a furnace a slag-boxof substantially reotan ular shape and provided witha tapered bottom, links pivotally mounted upon the side walls of said box, slag-dislod 'ng combs carried by the free ends of said links, means adapted to oscillate said combs and move the same upwardly and longitudinally,

and a conveyer disposed in the lowermost portion of the bottom of said box.

5. In a furnace a slag-box of substantially rectangular shape, and provided with a tapered bottom, slag-dislod ing co'mbs pivotally mounted upon the side walls of said box and provided with teeth adapted to be raised above the horizontal plane of the top of said side walls, means for actuating said combs, a gutter in the lowermost portionof said box, and a conveyer. operable in'said gutter.

6. In a furnace a slag-box of substantially rectangular shape and provided with a tapered bottom, slag-dislodging combs pivotally mounted upon the side walls, of said box and provided with teeth ada ted to be raised above the horizontal p ane of the top of said side walls, means for actuating said combs, a gutter in the lowermost portion of said box, a continuously rotatable screw journaled in said gutter, and means for rotating said screw.

7. In a furnace a slag-box of substantially rectangular shape and provided with a taperedbottom, slag-dislodging combs pivotally mounted upon the side walls of said box and provided with teeth adapted to be raised above the horizontal lane of the top of said side walls,elongate pitmen extending into said box and pivotally conand a continuously operable conveyer disposed in the lowermost portion of the bottom of said box. I

8. In a furnace a slag-box of substantially rectan lar. shape and provided with a tapere bottom, links pivotally -mounted upon the side walls of said box, slag-dislodging combs carried by the free ends of said links, means adapted to oscillate said combs and move the same upwardly and longitudinally, a gutter in the lowermost ortion of said box, and a conveyer operable 1n said gutter.

.9. In a furnace a slag-box of substantially rectangular shape and provided with a tapered bottom, links pivotally mounted upon .the'side walls of said box, slag-dislodglng combs carried by the free ends of said links,

means adapted to oscillate said combs and move the same upwardly and longitudinally,

a gutter in the lowermost portion of said naeaaae said box and pivotally connected to a link upon each side wali and adapted to oscillate said combs and movethe same upwardly and longitudinally, and aconveyer disposed in the lowermost portion of the bottom of said box.

11. In a furnace a slagbox of substantially rectangular shape, a fluid inlet nozzle extended across one end portion of said box, a transverse bridging wall overhanging said nozzle, a transverse outlet drain gutter adjacent the opposite end of said box and a depending dam in front of said gutter.

12. In a furnace a slag-box of substantially rectangular shape, a fluid inlet nozzle extended across one end portion of said. box, a transverse bridging Wall overhanging said nozzle, transverse outlet drain gutter adjacent the opposite end of said box a plate bridging said gutter, and a vertically disposed dam depending from said plate in front of said gutter.

Signed at Chicago, county of Cook and State of Illinois, this 3rd day of March, 1916.

WALTER A. KOSINSKI.

Witnesses:

E. K. Lunar, din, WM. HAROLD EICRELMAN. 

